The pD and p He total annihilation cross sections have been measured with the Obelix apparatus at LEAR at, respectively, three and two values of the p incident momentum between 70 MeVrc and 36 MeVrc. The values of the pD annihilation cross section, at such low energies, are in agreement with a surprising result obtained in a recent low statistics measurement of the antiprotonic deuterium K X-rays (M. Augsburger et al., Phys. Lett. B 461(1999)417, see following article), concerning the unexpected narrow width of the antiprotonic deuterium 1s level.
Antip-D and antip-4He annihilation cross-sections at very low energy
BENDISCIOLI, GIORGIO;FONTANA, ANDREA;MONTAGNA, PAOLO MARIA;ROTONDI, ALBERTO;
1999-01-01
Abstract
The pD and p He total annihilation cross sections have been measured with the Obelix apparatus at LEAR at, respectively, three and two values of the p incident momentum between 70 MeVrc and 36 MeVrc. The values of the pD annihilation cross section, at such low energies, are in agreement with a surprising result obtained in a recent low statistics measurement of the antiprotonic deuterium K X-rays (M. Augsburger et al., Phys. Lett. B 461(1999)417, see following article), concerning the unexpected narrow width of the antiprotonic deuterium 1s level.File in questo prodotto:
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